Tearjerkers

FL dies

FL dies

ML dies

FL dies

the leads are separated by time (FL returns to the present, ML remains in the past)

the leads are separated (FL returns to the real world, ML remains in the fictional one)

ML dies

ML is terminally ill, all three leads appear still as lost at the end as at the beginning

the leads separate (FL returns to the real world, ML remains in the novel)

FL dies, ML is prevented from adopting/raising her child who he was attached to

FL dies

ML dies

FL dies

FL and supporting characters die

FL dies

both leads die

both leads die

the leads are separated by time (FL returns to the present, ML remains in the past)

bittersweet/happy ending for the leads, almost everyone else dies

both MLs appear to die in the end

FL dies

FL dies after much tragedy

ML dies

ML dies

the leads separate

the leads are separated (FL returns to her parallel world, ML remains in his)

FL dies (possibly ML as well, it's unclear)

ML dies

leads separate

FL dies

ML dies

one of the FLs dies

one of the MLs dies

the leads separate (ML returns to the past, FL stays in present day)

ML has only a few years left to live

FL dies

the leads separate

FL dies

the leads separate (it appears one may die) 

FL dies

the leads are separated (ML returns to the past, FL stays in the present)

ML dies